AV8 you may claim to specialise in Poms but that website of yours doesn't say anything about JAA approvals ... could you please clarify, are you doing training for the JAA or CASA instructor rating?
It's all well and good if it's a JAA rating they're ending up with, but with all respect an Oz FI rating is about as much use to Brits as a condom machine in the Vatican, they're still going to have to pay for a JAA course on their return home.